1320344140 has 24 divisors (see below), whose sum is σ = 2773466640. Its totient is φ = 527995968.

The previous prime is 1320344101. The next prime is 1320344147. The reversal of 1320344140 is 414430231.

It is not an unprimeable number, because it can be changed into a prime (1320344147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100471 + ... + 112849.

It is an arithmetic number, because the mean of its divisors is an integer number (115561110).

Almost surely, 2^1320344140 is an apocalyptic number.

1320344140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320344140 is an abundant number, since it is smaller than the sum of its proper divisors (1453122500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320344140 is a wasteful number, since it uses less digits than its factorization.

1320344140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17721 (or 17719 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1320344140 is about 36336.5400113990. The cubic root of 1320344140 is about 1097.0566325732.

Adding to 1320344140 its reverse (414430231), we get a palindrome (1734774371).

The spelling of 1320344140 in words is "one billion, three hundred twenty million, three hundred forty-four thousand, one hundred forty".